Upper mantle structure beneath Bulgaria obtained by receiver function analysis
- 1Sofia University, Faculty of Physics, Meteorology and Geophysics, Sofia, Bulgaria (ggeorgieva@phys.uni-sofia.bg)
- 2Schmidt Institute of Physics of the Earth, Russian Academy of Sciences, Moscow, Russia (vinnik@ifz.ru)
- 3National Institute of Geophysics, Geodesy and Geography, Sofia, Bulgaria (lidim@geophys.bas.bg)
Deep structure beneath the central part of the Balkan Peninsula was studied using P and S receiver function technique. Data from seismic stations from the Bulgarian National Seismological Network and several stations from neighbouring countries were used. Depth of Mohorovicic discontinuity has been estimated between 28–30 km in northern and central Bulgaria to 50 km in southwestern of Bulgaria. The 410 km mantle boundary is uplifted by 10 km relative to nominal depth in the area of Rhodopean Massif. In northern Bulgaria, the boundary is lowered by 10 km. Indications of a low-velocity layer are present at a depth exceeding 410 km. The thickness of the asthenosphere is estimated as 50 km and the depth of lithosphere-asthenosphere (LAB) boundary varies between 40 and 60 km.
The results of this study have been published in Vinnik et. al., Izvestiya, Physics of the Solid Earth, 2021, Vol. 57, No. 6, pp. 849–863. This research has been carried out as part of a joint project supported by the National Science Foundation of Bulgaria (grant no. KP-06-RUSIA/27.09.2019) and the Russian Foundation for Basic Research (RFBR, grant no. 19-55-18008 Bolg_a).
How to cite: Georgieva, G., Vinnik, L., Oreshin, S., Makeyeva, L., Dragomirov, D., Buchakchiev, V., and Dimitrova, L.: Upper mantle structure beneath Bulgaria obtained by receiver function analysis, EGU General Assembly 2022, Vienna, Austria, 23–27 May 2022, EGU22-9483, https://doi.org/10.5194/egusphere-egu22-9483, 2022.
